diff --git a/heroku/heroku_python_basic_app/requirements.txt b/heroku/heroku_python_basic_app/requirements.txt
index f4530f50..24a9533a 100644
--- a/heroku/heroku_python_basic_app/requirements.txt
+++ b/heroku/heroku_python_basic_app/requirements.txt
@@ -1,4 +1,4 @@
-Flask==1.0
+Flask==2.3.2
 Jinja2==2.11.3
 MarkupSafe==0.18
 Werkzeug==2.2.3